Thermo Fisher Scientific Inc.
US ˙ NYSE ˙ US8835561023

SecurityTMO / Thermo Fisher Scientific Inc.
InstitutionPinnacle Associates Ltd
Latest Disclosed Ownership21,248 shares
Latest Disclosed Value $ 10,443,847
Pinnacle Associates Ltd ownership in TMO / Thermo Fisher Scientific Inc.

On April 21, 2026 - Pinnacle Associates Ltd filed a 13F-HR form disclosing ownership of 21,248 shares of Thermo Fisher Scientific Inc. (US:TMO) valued at $10,444,029 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 21,637 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -1.80% during the quarter. The current value of the position is $10,070,490 USD.

Pinnacle Associates Ltd has a history of taking positions in derivatives of the underlying security (TMO) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

TMO / Thermo Fisher Scientific Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-04-21 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 21,248 -389 -1.80 10,444 -16.70 0.1339
2026-02-05 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 21,637 -2,449 -10.17 12,537 7.32 0.1609
2025-11-13 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 24,086 534 2.27 11,682 22.34 0.1550
2025-08-04 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 23,552 -709 -2.92 9,549 -20.90 0.1383
2025-05-06 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 24,261 -8,457 -25.85 12,072 -29.07 0.1769
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,718 -1,994 -5.74 17,021 -7.62 0.2309
2024-10-25 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,712 511 1.49 18,425 -2.58 0.3133
2024-07-30 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,201 -116 -0.34 18,913 -5.18 0.2961
2024-04-26 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,317 -395 -1.14 19,946 8.26 0.3144
2024-01-19 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,712 -467 -1.33 18,425 3.47 0.3100
2023-10-24 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 35,179 770 2.24 17,807 -0.81 0.3310
2023-07-27 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,409 8,145 31.01 17,953 18.60 0.3115
2023-05-05 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 26,264 -473 -1.77 15,138 2.81 0.3096
2023-02-01 2022-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 26,737 -164 -0.61 14,724 7.91 0.3208
2023-01-25 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 26,480 -421 14,597 0.0003
2022-11-01 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 26,901 762 2.92 13,644 -3.92 0.3132
2022-08-02 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 26,139 481 1.87 14,201 -6.29 0.3097
2022-05-05 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 25,658 401 1.59 15,155 -10.08 0.2682
2022-02-02 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 25,257 -138 -0.54 16,853 16.16 0.2907
2021-10-19 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 25,395 -585 -2.25 14,509 10.71 0.2675
2021-08-02 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 25,980 -2,667 -9.31 13,106 0.24 0.2370
2021-05-12 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 28,647 -511 -1.75 13,074 -3.73 0.2493
2021-01-26 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 29,158 -169 -0.58 13,581 4.88 0.2758
2020-10-23 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 29,327 300 1.03 12,949 23.11 0.3076
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 29,027 -5,170 -15.12 10,518 8.46 0.2594
2020-05-13 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,197 -1,608 -4.49 9,698 -16.63 0.2946
2020-02-03 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 35,805 -749 -2.05 11,632 9.25 0.2547
2019-11-08 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 36,554 -2,622 -6.69 10,647 -7.46 0.2508
2019-08-05 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 39,176 12,728 48.12 11,505 58.93 0.2694
2019-05-10 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 26,448 -1,046 -3.80 7,239 17.65 0.1635
2019-02-05 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 27,494 1,551 5.98 6,153 -2.83 0.1588
2018-11-09 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 25,943 -3,050 -10.52 6,332 5.43 0.1314
2018-08-08 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 28,993 -164 -0.56 6,006 -0.23 0.1236
2018-05-11 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 29,157 278 0.96 6,020 9.77 0.1180
2018-02-12 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 28,879 -1,075 -3.59 5,484 -3.23 0.1054
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 29,954 -2,425 -7.49 5,667 0.32 0.1045
2017-08-09 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,379 -225 -0.69 5,649 12.80 0.1086
2017-05-09 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,604 -2,585 -7.35 5,008 0.87 0.0956
2017-02-10 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 35,189 606 1.75 4,965 -9.74 0.1002
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,583 -200 -0.57 5,501 7.02 0.1103
2016-08-15 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,783 -75 -0.22 5,140 4.13 0.1108
2016-05-13 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,858 -4,015 -10.33 4,936 -10.48 0.1056
2016-02-11 2015-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 38,873 150 0.39 5,514 16.45 0.1157
2016-02-09 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 38,873 150 5,514 0.1178
2015-11-10 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 38,723 0 0.00 4,735 -5.77 0.1048
2015-08-12 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 38,723 -375 -0.96 5,025 -4.32 0.0933
2015-05-15 2015-03-31 13F Thermo Fisher Scientific COM 883556102 39,098 -611 -1.54 5,252 5.57 0.0980
2015-02-12 2014-12-31 13F Thermo Fisher Scientific COM 883556102 39,709 475 1.21 4,975 4.19 0.0976
2014-11-12 2014-09-30 13F Thermo Fisher Scientific COM 883556102 39,234 -1,200 -2.97 4,775 0.08 0.0972
2014-08-14 2014-06-30 13F Thermo Fisher Scientific COM 883556102 40,434 -1,250 -3.00 4,771 -4.81 0.0931
2014-05-14 2014-03-31 13F Thermo Fisher Scientific COM 883556102 41,684 -550 -1.30 5,012 6.57 0.0977
2014-02-12 2013-12-31 13F Thermo Fisher Scientific COM 883556102 42,234 -350 -0.82 4,703 19.85 0.0918
2013-11-14 2013-09-30 13F Thermo Fisher Scientific COM 883556102 42,584 -187 -0.44 3,924 8.40 0.0812
2013-08-13 2013-06-30 13F Thermo Fisher Scientific COM 883556102 42,771 42,771 3,620 0.0814
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-05-13 2020-03-31 13F THERMO FISHER SCIENTIFIC COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-03 2019-12-31 13F THERMO FISHER SCIENTIFIC COM Call 1,000 325 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.